Looks like the Russkies have been stockpiling cruise missiles for years and are eager to get rid of old inventory. Get rid of their older less advanced models.
This war is a huge arms bazaar for the Russians where they are demonstrating their weaponry. Potential buyers are paying attention to the daily action./
I bet Assad is baying for every cost incurred. Russia is probably making money on the airstrikes. Obama still has his finger in his bum.